Door-frame.



T. BUGHHOLZ.

DOOR FRAME.

APPLIGATION'PILED MAY 31, 1911.

Patented Ja 11.80, 1912.

ll jtzz asses UNITED STATES I PATENT o THEODOR BUCHHOLZ, OF BERLIN, GERMANY,

ASSIVGNOR TOflHE FIRM or FACONEISEN WALZWERK L. MANNSTAEDT & CIR. ACT. GES, O1 KALK, NEAR COLOGNE, GER- MANY.

DOOR-FRAME.

To all about it may concern Be it known that T, TIN-1000K Bifcrmonz, a citizen of the German Empire, residing at Berlin, Germany, have invented certain new and useful lmprovements in Door-Frames, of which the following is a s 'iecitication.

My invention relates to ini nrovements in door fia-ni'iings and its object is to provide a door frame made up of rolled iron or steel of suitable section bentinto proper shape and offering certain advantages, as herein beloh referred to.

In descril'iing my invention I refer to the drawing herewith in which Figure l is a transverse section through a bar of rolled iron or steel bentinto a frame. as herein described, showing at the same time part of a wall to which it is attached. Fig. 2 is a section on the line. AA of Fig. 1. Fig. 3 is a front view as herein referred to, having members emanating therefrom wall: and Fig. 4 is a perspective view upon a portion of a frame showing across-piece, as herein below referred to, of modified shape.

While the frame a may, of course, be composed of any number of parts, I prefer it to be of one piece of iron or steel bent into the shape of a door frame, as illustrated in Fig. 3. a. I prefer to be. substantially a U having a shoulder c in its web bio-form a rabbet for i The sides (Z, (ll to embrace the f thereon and may de, one rib, throughthe edge of the door wing.

may be parallel to eacl'i'other wall e and the plastering be ribbed on the insi out, 9, being ordinarily sufficient. A brace or cross-piece i, or any number thereof, may be provided, having in each end a notch, recess groove or slot h h, adapted to of a door frame, f

to give a holdfast in the l l l l The section of the said rolled piecefiton the contiguous vertical ribs 9 and g of said frame and to be moved up and down in the latter wit-hout separation therefrom or lateral displacement of either end, for the purpose of bracing said frame at any vertical point desired, said braces being provided with for such purpose. In Figs. 1 and 2 the said brace or cross-piece i is of U-sect-ion and is provided with leaves 70 bearing against the sides of the frame, acting as springs to prevent any unintended slipping of the former. The said cross-piece or brace may be slotted to admitthe hooking-in and subsequent foldslots 71 and 7a en a in said rib l Specification of Letters Patent. Application filed May 3-1, 1911.

p the door frame is pos1t1on even in case of Patented Jana 1912. Serial No. 630,473. l

ing around of the'free ends of any armoring or other supports m that may be embedded in the wall. The said cross-piece or pieces. or any of them, I do not wish to restrictto shape and construction as just set forth, but there may be modifications as circumstances may require. Fig. 4, for instance, shows a U-shaped cross piece 2" which slightly corrugated or otherwism extensible and so placed on the ribs g, 9' that the sides 92., a bear against the sides of the frame. A slot is provided to receive the hooked end of any of the supports m embedded in the wall. Whenever a cross piece of this modified construction has been put in atthe proper place and brought into its proper position it may be made straight and by this way tightly clamped Within the door-frame.

Members 1) may be, as above referred to. provided in the. door frame, emanating therefrom, to be used as holdfasts in the wall (see Fig. 3).

The arrangement of parts, as described, secures a considerable strengthening of the door frame, so that any shocks or the like acting against one side are taken up by the other side and thus reduced in action, so that securely kept in place and excessive strain. Moreover, the movable arrangement of the cross pieces offers the advantage that the supports for the connection of the with the door frame may be embedded quite independ-ntly for themselves, the eross-pieces being t ien adjusted by sliding movements on the rib g, g and brought in proper position to the said supports. This may be of importance, for instance, in the insertion of door frames of the kind described in armored, thin walls, as frequently used in modern buildings and where it is necessary to fasten the iron or steel insertions, of whatever section they may be, in the proper place.

I claim:

1. A metallic door frame provided with a pair of vertical ribs, in combination with a bracing cross-bar of solid construction, ex-

23. A nietal'bar of door frame form and Ll-shape in cross section provided with verticai ribs, in combination with bracing crosspieces of solid construction, extending transversely from'one janib of said frame to the other, recessed to fit said ribs and adapted to be raised and lowered in said frame \yhile engaging said ribs.

in a door-franie consisting of a bar of metal U-section, bent into, doonframe shape and having a continuous rib inside, a

crosspiece of U-section having slots engaged by said rib to guide said piece and provided with leaves bearing against the sides inside of the said trance.

4. In a door-frame consisting otabarof metal of U-sect-ion, bent into a door frame of the ed to bear against the sides of the inside of the frame and slots adapted to receive the ends of holdfasts projecting into the same from the Wall intended for receiving the door.

5. In a door frame consisting of a bar of metal-0f U-section, bent into door frame shape and having a continuous rib inside, an extensible cross-piece of U-section haw ing'a slot adapted to receive the end of a holdfust projecting into the same from the wall intended for receiving the door.

In testimony whereof, I have signed my name to this specification'in the presence of two" subscribing Witnesses.

THEODOR BUCHHOLZ.

Vitnesses:

IIEN nY HAsrnn,

Wowmmn HAUPT. 

